Even though intensely sweet, it doesn’t taste like sugar, and A lot of people find that it's a bitter aftertaste. Stevia – Because the stevia plant is from the ragweed relatives, those with ragweed allergy symptoms is often allergic to stevia also, bringing about headaches. It’s not hazardous, but unpleasant, https://alch-lab.com/keto-diet/how-much-sugar-on-keto/